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Don't be busy with the Wi-Fi Internet connection next door. In fact, the Wi-Fi signal is even more useful. Researchers at the Department of Engineering at Duke University used inexpensive materials to invent a device that could convert microwave signals into usable electrical energy. In the future, you may be able to power your home with the Wi-Fi signal from the next home.
As long as the source of the transmitted wireless transmission signal can be converted to electrical energy, such as wireless routing, cell towers, or even floating satellites, it can be used as an object. The working principle of this device is actually the same with solar panels, but the use of the conversion source is different.
Using a few glass fibers and some copper wire as conductors, they made a circuit board that converts microwave signals to 7.3V. They hope to continue researching the conversion of electrical energy into larger voltages. Although this is only their research project, it is conceivable that the device can be made smaller in the future and then be built into the mobile phone to use the Wi-Fi signal and cell phone signal that can be obtained everywhere to charge.
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